Sailors salute while manning the rails of USS Trayer (BST 21) during the commissioning ceremony for the Navy's newest simulator. Trayer, along with Battle Stations 21, is the culmination of all training received at the Navy's only boot camp. The simulator is a grueling 12-hour test of a recruit's skills in several shipboard evolutions, including fighting fires and stopping floods. The final evolution, now held entirely in the Arleigh Burke-class destroyer simulator, marks a recruit's final rite of passage into the Navy. U.S. Navy photo by Mr. Scott A. By Scott A. The Navy's newest and largest simulator, USS Trayer (BST 21), was commissioned here June 18.